if (document.images) {

// main buttons preload

  home = new Image();
  home.src = "/images/buttons/home.gif";
  home_on = new Image();
  home_on.src = "/images/buttons/home_on.gif";
  
  about = new Image();
  about.src = "/images/buttons/about.gif";
  about_on = new Image();
  about_on.src = "/images/buttons/about_on.gif";
  
  services = new Image();
  services.src = "/images/buttons/services.gif";
  services_on = new Image();
  services_on.src = "/images/buttons/services_on.gif";
  
  clients = new Image();
  clients.src = "/images/buttons/clients.gif";
  clients_on = new Image();
  clients_on.src = "/images/buttons/clients_on.gif";
  
  books = new Image();
  books.src = "/images/buttons/books.gif";
  books_on = new Image();
  books_on.src = "/images/buttons/books_on.gif";
  
  articles = new Image();
  articles.src = "/images/buttons/articles.gif";
  articles_on = new Image();
  articles_on.src = "/images/buttons/articles_on.gif";
  
  newsletter = new Image();
  newsletter.src = "/images/buttons/newsletter.gif";
  newsletter_on = new Image();
  newsletter_on.src = "/images/buttons/newsletter_on.gif";
  
  contact = new Image();
  contact.src = "/images/buttons/contact.gif";
  contact_on = new Image();
  contact_on.src = "/images/buttons/contact_on.gif";


// about buttons preload

  steve_waterhouse = new Image();
  steve_waterhouse.src = "/images/buttons/steve_waterhouse.gif";
  steve_waterhouse_on = new Image();
  steve_waterhouse_on.src = "/images/buttons/steve_waterhouse_on.gif";
  
  meet_our_staff = new Image();
  meet_our_staff.src = "/images/buttons/meet_our_staff.gif";
  meet_our_staff_on = new Image();
  meet_our_staff_on.src = "/images/buttons/meet_our_staff_on.gif";
  
  our_philosophy = new Image();
  our_philosophy.src = "/images/buttons/our_philosophy.gif";
  our_philosophy_on = new Image();
  our_philosophy_on.src = "/images/buttons/our_philosophy_on.gif";
  
  press_clippings = new Image();
  press_clippings.src = "/images/buttons/press_clippings.gif";
  press_clippings_on = new Image();
  press_clippings_on.src = "/images/buttons/press_clippings_on.gif";
  
  alliances = new Image();
  alliances.src = "/images/buttons/alliances.gif";
  alliances_on = new Image();
  alliances_on.src = "/images/buttons/alliances_on.gif";
  
  information_packet = new Image();
  information_packet.src = "/images/buttons/information_packet.gif";
  information_packet_on = new Image();
  information_packet_on.src = "/images/buttons/information_packet_on.gif";
 
   videos = new Image();
  videos.src = "/images/buttons/videos.gif";
  videos_on = new Image();
  videos_on.src = "/images/buttons/videos_on.gif";
 

  how_to_contact = new Image();
  how_to_contact.src = "/images/buttons/how_to_contact.gif";
  how_to_contact_on = new Image();
  how_to_contact_on.src = "/images/buttons/how_to_contact_on.gif";


// services buttons preload

  keynote_speaking = new Image();
  keynote_speaking.src = "/images/buttons/keynote_speaking.gif";
  keynote_speaking_on = new Image();
  keynote_speaking_on.src = "/images/buttons/keynote_speaking_on.gif";
  
  consulting = new Image();
  consulting.src = "/images/buttons/consulting.gif";
  consulting_on = new Image();
  consulting_on.src = "/images/buttons/consulting_on.gif";
  
  sales_training = new Image();
  sales_training.src = "/images/buttons/sales_training.gif";
  sales_training_on = new Image();
  sales_training_on.src = "/images/buttons/sales_training_on.gif";
  
  individual_coaching = new Image();
  individual_coaching.src = "/images/buttons/individual_coaching.gif";
  individual_coaching_on = new Image();
  individual_coaching_on.src = "/images/buttons/individual_coaching_on.gif";
  
  team_selling = new Image();
  team_selling.src = "/images/buttons/team_selling.gif";
  team_selling_on = new Image();
  team_selling_on.src = "/images/buttons/team_selling_on.gif";
  
  fast_selling = new Image();
  fast_selling.src = "/images/buttons/fast_selling.gif";
  fast_selling_on = new Image();
  fast_selling_on.src = "/images/buttons/fast_selling_on.gif";
  
  value_scope = new Image();
  value_scope.src = "/images/buttons/value_scope.gif";
  value_scope_on = new Image();
  value_scope_on.src = "/images/buttons/value_scope_on.gif";
  
  design_seminar = new Image();
  design_seminar.src = "/images/buttons/design_seminar.gif";
  design_seminar_on = new Image();
  design_seminar_on.src = "/images/buttons/design_seminar_on.gif";


// clients buttons preload

  our_clients = new Image();
  our_clients.src = "/images/buttons/our_clients.gif";
  our_clients_on = new Image();
  our_clients_on.src = "/images/buttons/our_clients_on.gif";
  
  client_comments = new Image();
  client_comments.src = "/images/buttons/client_comments.gif";
  client_comments_on = new Image();
  client_comments_on.src = "/images/buttons/client_comments_on.gif";


// books buttons preload

  recorded_programs = new Image();
  recorded_programs.src = "/images/buttons/recorded_programs.gif";
  recorded_programs_on = new Image();
  recorded_programs_on.src = "/images/buttons/recorded_programs_on.gif";
 
  software = new Image();
  software.src = "/images/buttons/software.gif";
  software_on = new Image();
  software_on.src = "/images/buttons/software_on.gif";


}

function switchOn(imgName) {
    if (document.images) {
      document[imgName].src = eval(imgName + "_on.src");
    }
}
  
function switchOff(imgName) {
    if (document.images) {
      document[imgName].src = eval(imgName + ".src");
    }
}